BCHE and Parkinson disease: The treatment strategy of acute psychotic episodes in PD is primarily to address and treat the underlying cause, including general measures, treatment of specific triggers, adaptation of medication, and/or addition of cholinesterase inhibitors in cognitively impaired PD patients (rivastigmine, donepezil, or galantamine) and antipsychotic agents such as clozapine or quetiapine when not manageable with the previous steps as shown in Table 5.